GE MiCOM P40 Agile Technical Manual page 224

Chapter 7 - Distance Protection
Cyclic criteria are such that the priorities of the phases are always compared cyclically. For example, C(A) Cyclic
logic means: phase C is higher priority than phase A, phase A is higher priority than phase B, but in this case phase
B priority is higher than phase C.
The definitions of all acyclic and cyclic combinations are listed in the following table:
Criterion
A(B) acyclic A before B, B before C
B(A) acyclic B before A, A before C
A(C) acyclic A before C, C before B
C(A) acyclic C before A, A before B
B(C) acyclic B before C, C before A
C(B) acyclic C before B, B before A
A(C) cyclic A before C, C before B, B before A
C(A) cyclic C before A, A before B, B before C
You can set the phase preference with the Phase prio. 2pG setting in the SCHEME LOGIC column.
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Priority
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN, BN
BN, CN
CN, AN
AN, BN, CN
Convergent loops
P543i/P545i
Selected phase
AN
BN
AN
AN
BN
BN
AN
BN
AN
CN
AN
AN
AN
CN
CN
CN
BN
BN
CN
BN
BN
CN
CN
CN
BN
CN
AN
AN
AN
BN
CN
CN
P54x1i-TM-EN-1